Lamp lock-socket.



`, housing thebnseond the by.""1`lic casing 19 inclf'l' es' n-shel'l poitlon UNITED STATES-PATENT OFFICE; l i

anonimn. BENJAMIN, OF CHICAGO, ILLINOIS, AssIGNOR 'ro BENJAMIN ELncmnlIc MANUFACTURING GOMIANY, on OHIOAGO, ILLINOIS, A CORPORATION OFILLINOIS.

LAMP LOCKSOCKET.

'Immos Application led October 7, 1914. Seria1No.B65,467.

l .occonxpan drawing, forming a.' port 'of lli 'neciiien'monf .My invention relates to improvements in lomp locli` sockets and' has particular referm enne to men '1 for helping),A the-lamp in said socket l: Withdrawal.

14.5 For the purpose of .fliscliming my invention I have illustrated two embodiments.

'thereof in the accompanying drawing. n.

Figure l is c plan view of an angle socket embodying my invention; the cap which cov- ,ei's the insnlnting buse 'ofsiiidfsocket 'being locking screw; Fig. L is a section on theline 2N2 of Fig. 215 l, showing :i lamp bose locked inthe socket; Fig. 3 a bottom. plan view of the socket. showing the semiciicnlni spring which carries the looking projection; 1 L, Fig. 11 is a side 'elevation 'of :i special key used in ,locking and unlocking tlielmnp; Fig. i is an' end view'of the key; Figo n plan view of n n'lorlifif-ention of .my invention as embodied in o. straight socket; und l Fig. '7 in a vertical exialsecion through Fig. 6,

the socket of the modification of `showing( n lamp looked therein. .f

In Figs. 1, 9, and 3 vI have illustrated my invention :is embodied in an ongle socket '10, that is, o. socket, Whose axis is at un .angle .Witl1 respect to the conduit. to which ibis 15u12 'h conneclcdf Suid soclclijcompI-ises in dem eroi. on insulating lmser'll A('.z'urying Aloinding .1`-,sc1cws l2 mil 13 for" the lending-in Wires `(nolilsllown), .o threaded shell contact 14 `electricallyconnccitofl by inouns of a screw #15 .and binding filete 1G with the `bimfling scre'wwl, o spring'celiter contactY 17 lectrill connected with thegbindingfscrew 113, hinting sleeve. 18 sliilrounding the shell 20 having tubular meinbcr 21 offset there# Specication of Lettere Patent.

Temoved 'tos-how thcfloincling screws and the .a screw 35, the point/vof `from theshell .210.; the ke 38rv drawn sind. I l

The..engagement between c ntect, 111- and n. casing" 19 inclosing and'- iznts carried there- Patented Sepy; 1918.

from for connection with a conduit (not shown), through which the leading-in Wires are brought to the channels 22 and 23 in the base 11 leading to the binding screws 12 and 13 respectively, and includes a removable vcnn '24 litting over the shell 20 and held there; 60

on in any suitable manner as byv sp1-jing tonguesWQ-S engaging within a beudf on 'the cap. 4.. The bose 11. has anV .opening '27 therein and 'the'slie'll Contact 14 has lonfopen ing 2 8 therein, and through bot-h of these 65 yo enings extends an internally threaded s eeve 29, both ends of the sleeve being fianged over to .hold the shell Contact 14 and the base 11`to ther. Y

lnterposed otween the head ofthe screw 15 and a, Hnge 30 on thef-shell 'Contact 14 lis o. semi-circuler leaf spring 3 1-, suficl` spring having en openingl 32 bhroughqwfhich the screwl extends and hovinglitsffreeend o downwardly 'entexidingl .spin onprong 33 75 thel for engaging oudbitingfin' 34, The 'spring 31 @if` I the sleeve' 29, lsind thread engages the springfl to forceit f` nw The ten- 80 sion of the .springfiss'c y a tohtewnld to hold it` up v against the' piessileiof'fthe Screw 35. The Screw V'rlms aftlhiungular h engagcme t Witl a correction socket 87 im the fey38w Screw 35 und 'tlielaitfer-xs y to.

thee'n'd 7 e allow the springfl torest. ogfeiinsl;` of the sleeve 2. Thelcmp' base screwed 'initothessockeunti 4toot iis .inmsxvlimlile' engingernei` f with. fi spring contnctlf. fflfhe scneyiy Bois turned to bear downen he g 311 to force the prong' into t-he"{lamp h theg-Ialnp bose rendersi: uctically Siblofforfon unauthorized person tonnen-ew the lonip'to remove it f1'om"`t`.l1 esooket.

Itisto Vbenefited thai there is nothing about thc external appearance'bftlie'sock hen l knew thnt -rivet 41 is irscrew l2-l ,of the point of t e screw on provided with u lamp locking device; that the sleeve 27 and screw I3() which hold the shell cont-ect 14 on the base 11 ere also utilized to support the locking springr 31 'und the lock actuating screw 35, and that even if en unmithorized person it was necessary to loosen the screw iii] before removing the lmnp that this could not he done without n special key which would ent-er the recess 39 und fit the head 3G.

In the modilicationo Figs. 6 and. 7 I have illustrated my invention es embodied in e straight socket, that is, a. socket having its axis in line with the axis of the conduit for the leading-in wires, and have omitted thepronged spring between the screw end lamp base.

In this modification the en insulating hase to by means of n hollow rivet il sind screw 42 the usual shell contact 4:3 end also having secured thereto the usuel center Contact 44.-? end comprises nlso n casing 45 including n shell it sind n cap .4T lifting ov ir seid shell and detnchnbly secured, thereto in any Suitnhle manner. lhe cap ali' it tubular member 48 extending axially therefrom for securing it to :L conduit for the lending-in wires not shown). rthreaded in the hollow hnving :t triangular head 50 vfor engagement. with the key 38; the point of the screw i9 beers directly on the lamp buse 50. The cup 47 has an opening 51 therein through which the 'rey 38 may be inserted. Rotetnbly mounted on the cap .4,7 is n closure member oil held in place between the tubular portion 4S und the body of the cup 47. The closure member hes :in opening therein which niey be brought into regisH tration with the opening 51 so that the hey 38 may he inserted thrmiggh sind opening to operate the screw' i9.

In this modification i here inclnml the screw i9 somewhat to bring the head 50 into proper position und to secure n good ben-ring the .lump

to indicate that if. is

socket comprises i0 having secured there baise' 50.- l

The use of this modification of my invention is as follows: H 4it is desired to secure n lamp in the soc et the'cnp 47 is rotated to bring the opening 525 into regis* tration with the opening 5l, the key B8 is inserted and the screw 4.9 is bnckcd .iwny toe position. which will permit the proper insertion of the lmnp. The lump bese 50 is screwed into the socketnnd the screw 50 operated to cause the point thereof to engage and bite into the lump bese. 'lhe key is then withdrawn und the closure member 52 rotated' to move lite registration with the' 1 Y In both modificatie it is to the head of the loclygi screw is normally opening 53 out of socket including in line with the screw 149' he noted that concealed and that it must he operated from the end of the socket opposite that in which the lamp lnise is inserted.

.lt is to be noted too that in the modifica tion of Figs. 1., 2 und 3 the prong 33 es shown in Figs. .nnd 3 ie so inclined as to oll'er .little resistance lo the movement of the lump liaise when the hitter is being screwed into the socket, hut so ne to offer much greater resistance when it is attempted to Ivins-crew the lump from the socket So that even if the sc'zrew 235 in such e position that the spring 3l is held away Jroi'n the eleevc 29 the lump base may still. be screwed into the socket n suiiicient distance to ineke proper contact with the spring conteot i7.

Having thus described my invention what I claim new and. desire 'to secure by Letters Pnt-ent is l. A lump socket including en insuletin hase, means for locking n lump hase in sei i n :screw carried by said insulating; base, und closure means 'for preventing access to said screw.

A lamp socket including en insulating hase having n, shell Contact secured to one 'Inte thereof, und menne for securing e lamp in in seid .socket including e. screw having its livedy exposed, on the opposite fece of seid insulating; hase.

3. A- lamp vsocket nclnoing en insulating bese having u. shell Contact secured to one fece thereof7 means for securing n lamp hase in said socket includingl e sere* heed exposed on the opposite fece of seid insulating hase, and closure rnc-ins for pren venting iccess to Ysaid screw.

fl. A lai'np socket includinr nn insuletin hese, e shell Contact, ine-ins for securing sci shell to seid buse including n. hollow rivet, und Ineens for lockingA the lamp in said shell including screw thremied in seid hollow l'it- 5. A lamp socket including en insulating leise. :ind means for locking; a lamp in said socket including a leef spring secured atene end to seid base, and :t screw hr1-ving itsl point bearing on the free part o' said. leaf spring for forcing it into enga-gement with the lmnp buse.

(i. A. lmnp socket including en insulating bese, e shellV contact, means for locking ai lmnp in said shell including a spring, and means common to said shell and spring for securing thern'to scid hase.

7. A lnnip socket including en insulating' huso, n shell contact, means fdr locking n hunp in seid shell includintgyi, spring, und rneuns common to said Shel. in`d`spring for securing them toA said bese including e screw.

8. A lsini socket including an insulating buse, n. Shel contact, means for locking u, hunp in said shell including a spring, ineens connnon to seid shell and spring for securing them to said'bmae ncludiifgffacrgw,and? Meyer Contact nd `a, screw threaded in the `a indingfsCxewelctralljnected with said hollow' rivet' a'nd iengagng the other `said first s'cla'vel end of said curvd s'ing.

9` Aglam scktin'clucling m insulating In witness whew-n, I have hereunto sub- 5 base, a Shel contact,- center contat secured scribed my nume in the presence of two if to said base, means for securing salid'shell witnesses.

to said basa includin a hollow rivet, and REUBEN'L BENJAMIN.

a screw 0n. opposite si es of said Center con- Witnesses: tact, a curvedspring having one end secured W. L. Pollmum? 10 ltu said screw and extendmg around sal! ANNE SOLOMON; 

